Sifter for feed-mills



e, E. w. MARS DEN. SIFTER- FOR FEED MILLS.

APPLICATION FILED AUG. 1'. 1918- 1,36 2,725. Patented Dec. 21, 1920;

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GEORGE E. W. MARSIDEN, 0F IBELOIT, WISCONSIN, ASSIGNOR TO GEORGE B. SLATER AND GEORGE E. W. MARSDEN', 0F IBELOIT, WISCONSIN, COPABTNERS DOING BUSINESS AS SLATER & MARSDEN'.

"SIFTER FOR FEED-MILLS.

Specification of Letters Patent.

Patented Dec. 21, 1920.

To all whom it may concern: I

Be it known that I, GEORGE E. W. .MARS- DEN, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Sifters for Feed- Mills, of which the following is a specification.

This invention relates to a feed mill of the. type which is employed for grinding cereals or other food into meal or flour, and the invention refers more particularly to a screen and means for reciprocatingthe same to sift the ground meal and separate the finer from the coarser particles thereof.

The invention aims to provide a sifting means which is extremely simple and durable and which is operated from the main grinder shaft.

In the accompanying drawings Figure 1 is a side elevational view, with parts broken away, illustrating a feed mill equipped with sifting means embodying my invention. Fig. 2 is a horizontal sectional view taken in the plane of line 22 of Fig. 1. Fig. 3 is a vertical sectional view on line 33 of Fig. 1.

The feed mill which I have shown by way of example in the drawings comprises a body 5, which may be an integral casting, and which in the present instance has strengthening ribs or webs 6 projecting in opposite directions from the ends thereof.

The grinding chamber is indicated at 7, and 8 indicates a hopper, the upper portion of which is broken away, which hopper receives the material to be ground and feeds it to the grinding chamber. The grinding means is not herein shown, as the present invention is not concerned therewith, but said means is operated by a shaft 9 which is rotatably mounted in bearings in the body 5 and is arranged to be driven in any desired 3 way.

to retard the meal in its tendency to roll down the incline.

In the present instance the sifter is mounted upon the ends of two rods 12 which are supported and guided to reciprocate in apertures or notches 13 in the webs 6 at one end of the body. The opposite ends of these rods are attached to the lower end of a bifurcated lever ll, the branches of which straddle the mid-portion of the body 5. This lever is pivoted at 15 on an upstanding lug on the body, and the upper end of the lever extends laterally, or in other words the lever is of inverted L-shape. A cam or eccentric 16 is fixed upon the shaft 9 in position to bear against the upper end of the lever, so that in the rotation of the cam the lever will be oscillated. A pair of springs 17 located at opposite sides of the body have their ends attached respectively to the lever 14 and to an anchor 18, which is in the form of a U-shaped wire embracing the body, the arms of the anchor being bent into engagement with the flanges 6 on the body to secure the anchor in place.

. The springs 17 hold the lever 14 in contact with the cam 16 so that the sifter 10 will be reciprocated when the mill is in operation.

I claim as my invention:

1. A feed mill having, in combination, a body, a grinding shaft, a cam fixed on said shaft, an upright lever pivoted between its ends on the body and having its upper end bearing against said cam, the lower portion of the lever being bifurcated to straddle the body, a pair of springs attached to the lower arms of the lever to maintain the lever in contact with the cam, a reciprocatory sifter, and a pair of rods each attached at one end to the sifter and at its other end to one of the arms of said bifurcated lever.

2. A feed mill having, in combination, a supporting body, a drive shaft, means on said body horizontally reciprocable parallel to said drive shaft and carrying a sifter, a single cam-actuated element adapted to move said reciprocable means in one direction, resilient means for moving said reciprocable means in the opposite direction, and a radially acting cam mounted directly on the drive shaft of the mill and engaging said cam-actuated element.

3. A feed mill having, in combination, a supporting? body, a central hopper, and a front grinding chamber carried by said body, means reeiprocable horizontally parallel to the drive shaft of the mill, comprising a sitter under said grinding cham- 5 ber and a member supporting said sitter and eigtending under said hopper, a single camactuated element connected to said supporting member at the rear of said hopper, and

a cam on the drive shaft of said mill engaging said cam actuated element. 10 In testimony whereof I have hereunto set my hand.

GEORGE E. W. MARSDEN. 

